Ferrite Cores

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	Core Type	Supplier Device Package	Material	Diameter	Inductance Factor (Al)	Tolerance	Gap	Initial Permeability (µi)	Core Factor (ΣI/A) mm⁻¹	Effective Length (le) mm	Effective Area (Ae) mm²	Effective Magnetic Volume (Ve) mm³	Finish	Height	Length	Width
B64290P0037X830 FERRITE CORE TOROID 1.09UH N30 EPCOS - TDK Electronics	7,464 In Stock	1 : £0.46000 Bulk	TC6.3/3.8/2.5	Bulk	Active	Toroid	-	N30	0.249" (6.32mm)	1.09 µH	±25%	Ungapped	4300	4.97	15.21	3.06	46.5	Parylene	0.099" (2.52mm)	-	-
YW41003TC FERRITE CORE TOROID 4.392UH W Magnetics, a division of Spang & Co.	8,227 In Stock	1 : £0.60000 Bulk	-	Bulk	Active	Toroid	-	W	0.375" (9.53mm)	4.392 µH	±30%	Ungapped	10000	-	20.7	7.3	151.0	Parylene	0.125" (3.18mm)	-	-
B64290P0751X038 FERRITE CORE TOROID 5.5UH T38 EPCOS - TDK Electronics	6,244 In Stock	1 : £0.72000 Box	TC8/4/4	Box	Active	Toroid	-	T38	0.316" (8.02mm)	5.5 µH	±30%	Ungapped	10000	2.26	17.42	7.7	134.0	Parylene	0.158" (4.02mm)	-	-
B64290P0037X087 FERRITE CORE TOROID 560NH N87 EPCOS - TDK Electronics	434 In Stock	1 : £0.43000 Box	TC6.3/3.8/2.5	Box	Active	Toroid	-	N87	0.249" (6.32mm)	560 nH	±25%	Ungapped	2200	4.97	15.21	3.06	46.5	Parylene	0.099" (2.52mm)	-	-

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Ferrite cores are a magnetic device used in the windings of transformers or other wound components. The chemical makeup of these devices help to prevent eddy currents. These are created in different form factors such as: E, toroid, ER, multi-hole, etc. and come in many different sizes. Key parameters are going to be the size, form factor or core type, and inductance factor.